package com.atguigu.rabbitmq.springbootrabbitmq.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.CustomExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

/**
 * @author 连志阳
 * @since 2022/2/9
 */
@Configuration
public class DelayedQueueConfig {
    //队列
    public static final String DELAYED_QUEUE_NAME = "delayed.queue";
    //交换机
    public static final String DELAYED_EXCHANGE_NAME = "delayed.exchange";
    //routingKey
    public static final String DELAYED_ROUTING_KEY = "delayed.routingkey";
    
    /**
     * 声明交换机，基于插件的
     */
    @Bean
    public CustomExchange delayedExchange() {
        Map<String, Object> arguments = new HashMap<>();
        arguments.put("x-delayed-type", "direct");
        /*
        1.交换机名称
        2.交换机类型
        3.是否需要持久化
        4.是否需要自动删除
        5.其他参数
         */
        return new CustomExchange(DELAYED_EXCHANGE_NAME, "x-delayed-message",
            true, false, arguments);
    }
    
    @Bean
    public Queue delayedQueue() {
        return new Queue(DELAYED_QUEUE_NAME);
    }
    
    /**
     * 绑定
     */
    @Bean
    public Binding delayedQueueBindingDelayedExchange(
        @Qualifier("delayedQueue") Queue delayedQueue,
        @Qualifier("delayedExchange") CustomExchange delayedExchange
    ) {
        return BindingBuilder.bind(delayedQueue).to(delayedExchange).with(DELAYED_ROUTING_KEY).noargs();
    }
    
}
